Common Contractions and Acronyms

With the growing popularity of the Internet over the years, Area Forecast Discussions (AFD), written by forecasters in the National Weather Service, are accessible to a much larger number of people than in years past, when the discussion was essentially an internal coordination device. It is because the AFD has become such a public product that forecasters have been discouraged from using abbreviations and contractions whenever possible. Nevertheless, certain common contractions are still used. These contractions frequently refer to meteorological parameters unfamiliar to the general public. If you are a reader of our AFDs, you may be interested in making some sense out of the alphabet soup. On this page, you will find out what many of those obscure contractions stand for. If you can't find the contraction you are looking for on this page, a more exhaustive list is available.

(Persons using assistive technology to read this page may click here to skip the following alphabetic navigation links.)


A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

  • AAF - Apalachicola, FL
  • ABY - Albany, GA
  • ADVY - Advisory
  • AFTN - Afternoon
  • AL - Alabama
  • AMS - Atmosphere
  • AOA - At or Above
  • AOB - At or Below
  • AQQ - Apalachicola, FL
  • FFCC - FFCantic
  • ATTM - At This Time
  • AVN - The Aviation Model (120-hour numerical model of the atmosphere)

  • BECMG - Becoming
  • BKN - Broken
  • BL - Boundary Layer
  • BLO - Below (refers to cloud coverage)

  • C - Celcius
  • CAPE - Convective Available Potential Energy
  • CAA - Cold Air Advection
  • CB - Cumulonimbus clouds (thunderstorms)
  • CHC - Chance
  • CI - Cirrus clouds
  • CONUS - Contnental U.S.
  • COORD - Coordination
  • CTY - Cross City, FL
  • CU - Cumulus clouds
  • CWA - County Warning Area
  • CWFA - County Warning and Forecast Area

  • DHN - Dothan, AL
  • DVV - Downward Vertical Velocity (sinking air)
  • DZ - Drizzle

  • E - East
  • ERN - Eastern
  • ECMWF - The European Center's Medium-range Weather Forecast Model (7-day numerical model)
  • ETA - The Eta Model (60-hour numerical model of the atmosphere)

  • F - Fahrenheit
  • FA - Forecast Area
  • FAN - AVN MOS Guidance (older version)
  • FCST - Forecast
  • FL - Florida
  • FMR - MRF MOS (older version)
  • FROPA - Frontal Passage
  • FT - Foot or Feet
  • FWC - NGM MOS Guidance

  • GA - Georgia

  • IR - Infrared
  • ISOLD - Isolated

  • KEOX - Fort Rucker, AL, Doppler Radar
  • KEVX - Eglin Air Force Base Doppler Radar
  • KTLH - Refers to either the Tallahassee Doppler Radar, ASOS, or Upper Air Sounding
  • KT(S) - Knot(s)
  • KVAX - Moody Air Force Base, GA, Doppler Radar

  • LFQ - Left Front Quandrant
  • LI - Lifted Index
  • LLJ - Low Level Jet

  • MAV - AVN MOS Guidance
  • MB - Millibar
  • MEX - MRF MOS
  • MOS - Model Output Statistics
  • MRF - The Medium Range Forecast Model (10-day numerical model of the atmosphere)

  • N - North
  • NE - Northeast
  • NERN - Northeastern
  • NGM - The Nested Grid Model (48-hour numerical model of the atmosphere)
  • NM - Nautical Mile(s)
  • NOGAPS - Navy Operational Global Atmospheric Prediction System (120-hour numerical model)
  • NRN - Northern
  • NVA - Negative Vorticity Advection
  • NW - Northwest
  • NWRN - Northwestern
  • NWS - National Weather Service

  • OBS - Observations
  • OVC - Overcast

  • PAC - Pacific
  • PFN - Panama City, FL
  • POP - Probability of Precipitation
  • PROG - Forecast
  • PVA - Positive Vorticity Advection
  • PW - Precipitable Water
  • PWAT - Precipitable Water

  • QG - Quasigeostrophic
  • QPF - Quantitative Precipitation Forecast

  • RA - Rain
  • RAOB - Radiosonde Observation (Upper Air Observation)
  • RH - Relative Humidity
  • RRQ - Right Rear Quadrant
  • RUC - The Rapid Update Cycle Model (12-hour numerical model of the atmosphere)

  • S - South
  • SAT - Satellite
  • SCA - Small Craft Advisory (locally defined as winds of 20-33 kt inclusive and/or waves 7 ft or higher)
  • SCEC - Small Craft Exercise Caution (for winds 15-20 kt with waves 6 ft or less)
  • SCT - Scattered
  • SE - Southeast
  • SERN - Southeastern
  • SFC - Surface
  • SHRA - Rain Showers
  • SRN - Southern
  • SW - Southwest
  • SWRN - Southwestern
  • S/WV - Short Wave

  • TCU - Towering Cumulus
  • THETAE - Equivalent Potential Temperature
  • TLH - Tallahassee, FL
  • TSRA - Thunderstorms (with rain)
  • TSTM - Thunderstorm

  • UKMET - The United Kingdom Meteorological Office's Model (72-hour numerical model of the atmosphere)
  • UTC - Universal Coordinated Time (same as Greenwich Mean Time)
  • UVV - Upward Vertical Velocity (rising air)

  • VCNTY - Vicinity
  • VIS - Visible
  • VLD - Valdosta, GA
  • VORT MAX - Vorticity Maximum

  • W - West
  • WRN - Western
  • WAA - Warm Air Advection
  • WFO - Weather Forecast Office
  • WV - Water Vapor
  • WX - Weather

  • XSEC - Cross Section

  • ZFP - Zone Forecast Product

     

  • 88D - Doppler Radar

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